Railroad-spike and tie-plate therefor.



PATENTED JUNBZ, 1903. J. -w, MAGAULAY. RAILROAD SPIKE- AND .TIE PLATE THEREPOIL:

APPLIUATION TILED OUT. 9., 1902.

0 MODEL.

WITNESSES:

vIii/ma 76y TTORNEY,

wnms PETERS ca, PunYouTno msnmu'rou n c of California, have invented certain new and actly a full turn when driven through its No. 730,139. Patented. Tune 2, 1903.

,VUNITED STATES PATENT OFFICE.

JOHN W. MACAULAY, OF SAN JOSE, CALIFORNIA;

RAILROAD S PlKE AN D TIE-PLATE THEREFOR.

SPECIFICATION forming part of Letters PatentNo. 730,139, dated June 2, 1903-. Application filed October 9, 1902. Serial No. 126,566. (No model.)

To all whom it may concern: 8, extending from the sides of the holes 4, in 5 5 Be it known that I, JOHN W. MACAULAY, a which recesses the ribs 7 of the spike move citizen of the United States, residing at San as the spike descends. 'By this means it is Jose, in the county of Santa Clara and State absolutely insured that the spike makes eX useful Improvements in Railroad-Spikes and whole length, and therefore that the head of 60. Tie-Plates Therefor, of which the following is the spike shall point in the same direction a specification. I when driven home into the tie as when it is My invention relates to railroad-spikes and firstlplaced upon the tie to drive it in. Thus tie-plates therefor, the object of my invention it is insured that the head of the spike will being to provide a spike and tie-plate by when driven home be in proper position over 65 means of which the rail may be held down to the flange of the rail. The ribs 7 or threads the tie with greatersecu'rity than heretofore formed upon the spike are cut off to form and with substantially no greater cost than shoulders 9 at a point which will be below r5 with prior forms of spikes and tie-plates. the surface of the tie-plate when the spike is My invention therefore resides in thenovel driven home. .The upper ends of said ribs 7e construction, combination, and arrangement are made slightly wider or thicker-at the of parts for the above ends, hereinafter fully upper part 10, as seen by comparison'of Figs. specified, and particularly pointed out in the 5 and 6, so as to move snugly through the reclaims. cesses or slots as the spike is driven home,

In the accompanying drawings, Figure 1 is thus insuring both that the head of the spike 7 5 a perspective view of a portion of a rail seshall point accurately at right angles to the cured by means of my improved spike and edge of the rail and over the flange thereof tie-plate. Fig. 2 is a vertical section showing and also a. better resistance against removal 2 5 the spike in side elevation in the position in of the spike.

which it has partly descended into the tie. In Fig. 7 is shown a modified form of the 80 Fig. 3 is a similar view showing thespike invention in which the spike is made with a having wholly descended thereinto. Fig. 4: is grooved thread instead of with a rib, and the a horizontal section on the line A A of Fig. 2. plate is formed with projections or lugs 11,

Figs. 5 and 6 are cross-sections ofthe spike extending into the hole in said plate, which on the lines 13 B and G C, respectively, of projections 11 enter said grooved threads. 85 Fig. 2. Fig. 7 is a viewsimilar to Fig. 4 of I claim a modified form of the tie-plate and spike. 1. In combination, a tie-platehaving a-hole Referring to the drawings, 1 represents a through which the spike passes, and a spike 3 5 railroad-tie upon which is secured a rail 2, passing through said hole, said spike having said rail resting upon a tie-plate 3, which is a spiral rib formed on its surface and entero driven into the tie. Said tie-plate has formed ing a recess in said plate at theside of the on each side of the rail holes 4 to receive the hole to guide and turn the spike in its downspikes 5, the heads 6 of which extend over ward movement, substantially as described.

the flange of, the rail and hold it securely in 2. In combination, atie plate having a hole place. My invention resides in the novel through which the spike passes, and a spike 5 a construction of such tie-plate and railroadpassing through said hole, said spike being spike. In order that the spike shall be held. threaded to impart rotation thereto in its de-' in the wood of the tie as firmly as possible scent, and the hole being shaped to conform against displacement, it is provided with two to the cross-section of the spike to accurately diametrically opposite spiral ribs or threads 7. guide or turn said spike in its downward I00 The pitch of each of these threads is such as to movement, substantially as described. impart to the spike one complete turn While In witness whereof I have hereunto set my it is being driven down into the wood. In hand in the presence of two subscribing witorder to insure that the amount of rotation nesses.

given to the spike shall be accurately one com-' J. W. MAOAULAY. plete turn independently of the nature of the Witnesses: i

wood, whether soft or hard or wet or dry, the I FRANCES M. WRIGHT,

tie-plate has formed the rein recesses or slots BEssIE 'GQRFINKEL 

